Ok. 3rd De Weekend for me. Temps were in the hundreds here in Nevada. Car ran good and fast, but... By end of day the pressure in the tank was high and when I come into pits. the Fuel in the tank is boiling. Slowly turn cap to relieve pressure.

Questions
1. Do these cars have a breather tube or sealed system.
2. I did not think the gas caps were the breather. I dont think my gas cap is original. My 86 daily has a different cap than the 84.
3. The pickup system behind the fender. Keep this or do people vent straight out? OK Just Read talk about Adding a Filter to the hose instead. But that was a conv. between 2 People. What is everyone doing here?

Sorry still learning. Did search but could not find the answers.